... :4.8 ,6.8,8.8... Aluminum Fasteners,Blind Fasteners, Weld Fastener 1.What’s the specification of our Products ? MaterialCarbon ... H62,H65,H68...Aluminum is good Aluminum.Meanwhile,we can use other materials accordingto customer's demand .ThreadType "M","UNC","UNF ... shipment ,small order will be full payment .6)Shipment:By truck,by air,by sea..Thanks for clicking our products!Welcome to call ...